Sintering apparatus.



F. A. EUSTIS. sxNTERlNG APPARATUS.

. APPLlcATxoN FILED AusAs. 1915. v 192125333 Patented Jan.16,191?. s'sHEETs-SHEET l.

F. A. EUSTXS.

SINTERlNG APPARATUS. APPLncATxoN man Aucm. 19.15.

Patented Jan. 16, QU.

3 SHEETS-SHEET 3.

L. A. ...L

FREDERICK A. EUSTIS, GF MELTON, MASSACHUSETTS.

SNTERNG APARATUS.

Sperication of Letters Patent.

Application filed August 18, 1915. Serial No.' L6,031.

aratus of which the followino is a s iecilication.

rhis invention relates to apparatus for sint-orang,` fine ores of lead, zinc, copper, iron and other Ene materials, by which the small particles are aggloinerated into a solidified mass. The sticking together of lines is desirable in many metallurgical operations.

The sintering process, to describe it `generally, consists in subjecting the line ore, mixed with a` certain proportion of line fuel, to a burning or roasting treatment, bv which the small particles are fused and af.;- glonieraterl into a porous mass. This process is usually carried on in a sintering pan in which a heel oi the material is helrl while the combustion of the fuel niixeil witn the oro takes place, and it the object of the present invention to improve the cfrnstruction of sintei'ingv apparatus, and render the salue more elicient, and economical in operation.

ln the accoxnpainf'ing drawings which illustrate the invention, Figure l. an enfl elevation of one sinterino; unit containing lhe invention. :Wrangelll in a building which will preferably conain a series oi: siniilar units; Fig. L is a plan view, par away. showing` one oi sairil units on an enlarnwl scale; Vig. E is a cross section on line` liig. l is an enlarged detail, partly in sule elevation. an l partly in section, o? one oll the pneumatic iatch oporalingf devices for the cover; and Fig. is view illustrating a nioiliiication.

'The sinl'ei-ing' piani;y ci-znpi buihlinf l. in which a ser". units are :Wrangell in a row so tl all bo supplied with material 'ir which runs on overhead rails above the several units.

il of if;

suitable llach unit consists of a iixefil. pan i. havingwan open bottoni and an open (op. niounteil on suitable, supports in the building. 5 is a, cast iron liningh 'for the walls o1" the fixed pan to prevent the hears i-ron warping),` or injuring` the structural o which the pan is mede.

At the bottom of the fixed pan Ll, are the grate 6 and unfler pen 7 ,assembled to niove as one part, and pivoted to the xeel pan at S to swingl downward to the positions shown in dotted lines.

The top of the iiXed pan #l is closed vby a cover 9, which sv'ings upward to dotted line position (Fig. l) on hinges l0, having their pivots at ll, somewhat in the rear of and bel low the pan, so that the cover when open will be clear of the pan and out of the way .of the car fi.

cover 9, which lever is in turn operated by' a piston rod l?, connected to piston 1S in a pneumatic c vlinfler i9. Two air pipes, 20 and 2l, communicate with cylinder 19 at opposite sides of the piston, and as the loclr opening pressure is exerted on the entire area ol" the piston 18, while the closing pressure is exerterl only on the area of the piston less the cross sectional area of the piston roil. the effective force for opening the loelz will oe great .r than that 'for closing it, thus insuring the release ot' the bolts. Said nir pipes are supplied through pipes 251i from a. suitable source of air pressu' trollefl hy valves at soine convenient station, 22, where 'the operator may stand.

r,The cover 9 is counterweighted by means a weight 23, carried on an arm 24. The arin 24 also serves as an operating arm for opening' and closing the cover, and is actuatefl oy a pneumatic ope *ating device, consisting of cylinder Q5, containing a piston 26, which x'noves piston roti. piro* connecterl to arn'i El. mi fl :l MC l/ mounted to swing on a pivot t piston and piston rofl yaojecteti the cover will he closefl, shown in solid line "eosition; when the piston and piston rocl trarterl the cover will be opened, as shown in ilotterl line position, 'ie piston 2G is. operatefl by suitable pr '228, which cleliver compresswl air to the c y'linrler 25 at opposite sides or the piston. anti are controlled by valves at station :22. "n a iiniiar manner the rate 6 and under pan 7 are operated by a pneumatic cylinder E29, pivotslly mounted fdl CII

at 30, and having' a piston rod Bconnected tothe under pan 7. The cylinder 29 is supplied with air by pipes o2, which are controlled by valves at the station 22. Air is forced into the pan through the air pipes, or bustle pipes 33, which enter through the side of the cover, and are connected through swivel joints 34 with a main air supply pipe 35, to which a blast of air is supplied by a suitable blower or pump (not shown).

36 is a gas pipe, connected to a cross head 37 within the cover i), from which cross head project a number of branch gas pipes 38 to form gasl jets for igniting the charge in the pan. The gas pipe 3G is connected, through swivel joint 39, to the main gas supply pipe 40.

4l is a water pipe connected to a cross head 42, from which the branch water pipes 43 extend, to deliver jets or sprays of water upon the material in the pan. The pipe il is connected through swivel joint 44C with a main water supply pipe 45. All of said swivel pipe joints have their axes coincident with the axis 11 of the cover hinges, so that when the cover is opened and closed all of the pipes in the cover are free to move with it. A smoke stack 46, secured to the wall of iXed pan 4, leads from the space in the under pan below the grate. f t

ln operation the fine ore, with about 5% to 1.0% of line i'uel, forming the charge, is carried along in ear LL over one of the sintering units, the cover 9 is opened, and the charge is spread out in the pan on grate 6. The cover is then closed and locked by the pneumatically operated locking devices above described, which hold the cover tightly in place against the air pressure subsequently introduced into the closed pan.v Air is forced in through the bustle pipes 33, and passes down through the charge and out through the stack. lThe charge is then ig nited by means of the jets from the gas pipes 38, and after it is well ignited the gas is turned oii. The products of combustion escape through stack 46. During the sintering process water is thrown on to the material in the pan from time to time as desired, through water pipes 43, while the fuel is burning. This substantially improves the sintering probably by keeping the temperature down. After the small particles of ore have been thoroughly fused together and the fuel burned out, the grate 6 and under pan 7 are swung down to dotted line position, and the agglomerated mass is dumped out into a chute 47, whence it is delivered into a suitable receptacle, such as a car 48, which may be on tracks outside ot the building. Instead of dumping the metal down aninclined chute into a car outside, it may be dumped into a; car immediately underneath the sintering pan shown in Fig. 5,

= in this case the under pan must be arranged applying suction below the material. When the draft is obtained by suction, the pump or blower has not only to handle a far greater volume of gas owing to its temperature, but it is subject to much more rapid deterioration by reason of handling a hot, dirty, moist gas. The blowing of cold air under pressure on top of the material saves nearly half the power required for produc-- ing the same draft, and lat the same time results in a marked saving in wear of the blower. n

It will be noticed that the right hand side of the under pan, as viewed in the drawings, that is, the side opposite the hinge, is open, whereby the dirt which falls through the grate 6 during the sintering process and lodges in the pan 7, will be dumped out when the pan 7 is swung down to dotted line position. When the pan 7 is in closed position its open side will be closed bv the downwardly extending parto the side wall 4a ot' the fixed pan. The stack 46 is fastened to.

the downwardly extending wall 4, so that it remains undisturbed when the under pan 7 is swung away from the fixed pan.

rThe structure of the downwardly swinging grate is also well adapted to the use of a water cooled grate, in which case some or all of the grate bars would be in the form 'l of water pipes communicating with a water circulating pipe. The inlet vand outlet of such water pipe grate bars should belocated in the axis otl the hinge of said grate and under pan, and should be provided with swivel joints connecting them with the water circulation pipe, precisely similar to the swivel joints in the pipes entering the cover.

I claim: i

l. A sintering apparatus comprising a pan, a cover for said pan, and means to force 'air under pressure from a blower or air pump into said pan between the cover and grate, thereby to produce a downward draft ot air through the charge on the grate.

2. A sintering apparatus comprising` a pan, a cover for saidv pan, and means to torce air under pressure from a blower or air pump into said pan between the cover and grate, thereby to produce a downward draft of air through the charge on the grate, and means to lock the cover in closed position.

3. A sintering apparatus comprising a pan, a cover viior said pan, and an air pi e extending into the apparatus between t e lll cover and grate adapted to deliver air under pressure above the charge on the grate and thereby to produce a downward draft therethrough. v

4. In a sintering apparatus, a sintering pan having a grate, a cover for said pan, a stack leading from below said grate, and an air delivery pipe extending into the apparatus between the cover and the grate ,adapted to deliver air under pressure .above a bed of material on the grate, said air delivery pipe being movable away from its operative position over the grate.

5. In a sintering apparatus, a sintering pan having a grate, a cover hinged to swing to open and closed position on said pan, an air delivery pipe connected to said cover and swinging therewith, adapted to deliver air under pressure above a bed of material on said grate, an air supply pipe to which said air delivery pipe is connected, and a swivel joint between said'air delivery and supply pipes.

G. In a sintering apparatus, a sintering pan having a grate, to open and closed position on said pan, an air delivery pipe connected to said cover and swinging therewith, adapted to deliver air under pressure above a bed of material on said grate, an air supply pipe to which said air delivery pipe is connected, and a swivel joint between said air delivery and pipes, a gas ignition pipe connected to said cover and swinging therewith, a gas supply pipe to which said gas ignition pipe is connected, and a swivel joint between said gas ignition and supply pipes'.

7. In a sintering apparatus, a sintering pan having a grate, a cover hinged to swing to open and closed position on said pan, an air delivery pipe connected to said cover and swinging therewith, adapted to deliver air under pressure above a bed of material on said grate, an air supply pipe to which said air delivery pipe is connected, and a swivel joint between said air delivery and supply' pipes, a water delivery pipe connected to said cover and swinging therewith, a water supply pipe to which said water deliver pipe is connected, and va swivel joint between said water delivery and supply pipes.

S. In a sintering apparatus, a fixed pan, a cover hinged to swing to open and closed position on said pan, a grate and under pan the grate.

a cover hinged to swing Supply at the bottom of said fixed pan hinged to swing downward relatively to said fixed pan, an air delivery pipe extending into the apparatus between the cover and grate adapted to deliver air under pressure above a bed of material on the grate, said air delivery pipe being movable away from its position over the grate, and a stack leading from below 9. In a sintering apparatus, a fixedpan, a cover hinged to swing to open and closed position on said pan, a grate and under pan at the bottnrof said ixed pan hinged to` -swing downward relatively to said fixed pan, an air delivery pipe extending into `the apparatus between the cover and grate adapted to deliver air under pressure above a bed of material on the grate, said air delivery pipe being movable away froln its position over the grate, and a stack connected to a fixed part of the apparatus, independent of .the downwardly swinging grate and under pan, and communicating with the space between said grate and under pan.

10. In a sinteringapparatus, a fixed pan, a cover, a grate and under pan at the bottom of said lixed pan, hinged to swing down` wvard relatively to said fixed pan, means to force air into said apparatus above said grate, said under panhaving an open side and said fixed pan having a downwardly extending side wall adapted to close said open 'side when the under pan is in closed position, and a stack connected to said downwardly extending side wall of the fixed pan, communicating with the space between said grate and under pan.

11. In a sintering apparatus, a fixed pan, a cover hinged to swing to open and closed position on said pan, an air delivery pipe entering through said cover to deliver airunder pressure above a bed of material in said pan, a grate and under pan at the bottom of said fixed pan, hinged to swing downward relatively to said fixed pan, and a stack connected to said fixed pan and communicating with the space between said grate and under pan. l Signed by me at Boston, Massachusetts, this 19th day of August 1915.

FREDERICK A. IC ,"'IIS. 1Witnesses:

Ronn'r CUsnMAN, IosnrirINn II. RYAN. 

